Find the sum.1 +2 + 3 + . . . + 267

A. 71,556
B. 71,289
C. 35,511
D. 35,778

Answer: D

Mathematics

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A. 1078 B. -1078

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Add or subtract. Write the answer in lowest terms.-  - 

A.
B.
C.
D.

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Find the second derivative. ?   ?

A.
B.
C.
D.
E.

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